Keystone XL would mean Canada gets the money, China (or some other foreign buyer) gets the oil and the U.S. gets the pollution.
While some may be cheering the lack of snow as welcome relief, the widespread shortage of it spells trouble for the ski industry.
China's largest airlines are refusing to comply with Europe's new greenhouse gas emissions regulations
To comply with a new EU emissions trading rule, Delta Airlines has added a surcharge to tickets on European flights. Will others follow?
China has ambitious goals for producing electric and hybrid vehicles, but the reality is a different story.
The European Court of Justice upheld a challenge to Europe's plan to charge airlines for their greenhouse gas emissions.
Rhode Island has created the nation's first plan that lays out the best places for offshore wind farms to be built, and some spots where they can't.
A proposed wind farm has divided the small town of Cape Vincent, New York, demonstrating the challenges involved in expanding this renewable energy source.